Q2) Calculate the rate constant for the first order decomposition reaction of phosphine [PH3], M (at 120 °C): 4PH3(g)→ P4(g) + 6H₂(g)? .64 * 10 ^ - 2 Time (sec) a) 2.47 * 10 ^ - 2 * s ^ - 1 0 2.32 *10^ - 8 1.16 * 10 ^ - 2 (5.80 * 10 ^ - 3)/84 b) 28s ^ - 1 c) 4.64*10^ -2 overline s^ -1 56 d) 3.57 * 10 ^ - 2 * s ^ - 1
Q2) Calculate the rate constant for the first order decomposition reaction of phosphine [PH3], M (at 120 °C): 4PH3(g)→ P4(g) + 6H₂(g)? .64 * 10 ^ - 2 Time (sec) a) 2.47 * 10 ^ - 2 * s ^ - 1 0 2.32 *10^ - 8 1.16 * 10 ^ - 2 (5.80 * 10 ^ - 3)/84 b) 28s ^ - 1 c) 4.64*10^ -2 overline s^ -1 56 d) 3.57 * 10 ^ - 2 * s ^ - 1
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Question
Q2) Calculate the rate constant for the first order decomposition reaction of phosphine
[PH3], M
(at 120 °C): 4PH3(g)→ P4(g) + 6H₂(g)? .64 * 10 ^ - 2
Time (sec)
a) 2.47 * 10 ^ - 2 * s ^ - 1
0
2.32 *10^ - 8
1.16 * 10 ^ - 2
(5.80 * 10 ^ - 3)/84
b) 28s ^ - 1
c) 4.64*10^ -2 overline s^ -1
56 d) 3.57 * 10 ^ - 2 * s ^ - 1
![1Angstrom= 100 pm, 1 atm = 760 torr, R 8.3145 J/K. mol, R=0.08206 L. atm/K. mol
Q1) Which of the following statements regarding collision and transition state theories
is INCORRECT?
a) Activation energy is always positive.
b) Reactants must collide to form products.
c) Reactant collisions must be oriented properly to form products.
d) All reactant collisions result in product formation.
Q2) Calculate the rate constant for the first order decomposition reaction of phosphine
(at 120 °C): 4PH3(g) → P4(g) + 6H2(g)?
[PH3], M
Time (sec)
a) 2.47x102 s-1
4.64 x 102
2.32 x 102
1.16 x 10-2
5.80 x 103
28
56
84
b) 28 s
c) 4.64 x 102 s
d) 3.57 x 102 s
Q3) Which of the following is true depending on the given rate law: Rate =
k[IO; ][I-]°[H*]?
a) This reaction is 1st order with respect to IO3- and 3rd order for the overall reaction.
b) This reaction is 2nd order with respect to I- and 3rd order for the overall reaction.
c) This reaction is 1 order with respect to IO3- and 5th order for the overall reaction.
d) This reaction is 3rd order with respect to H*.
Q4) The 1st order reaction: A → products, the [A], = 0.40 M. What is the concentration
of A after 12 seconds if the half-life of the reaction is 2 seconds?
a) 0.10 M
b)8.0 x 102 M
c)1.01 x 102 M
d) 6.22 x 103 M
Q5) The following reaction 2A + 3B -→ Products has rate constant k1 = 1.8 L/mol.sec
at 550 °C and rate constant k2 = 2.8 L/mol.sec at 25 °C. Calculate the activation energy
for this reaction?
a) 1.4 x 105 J/mol
b)2.0 x 105 J/mol
c) 3.6 x 105 J/mol
d)2.5 x 105 J/mol
Q6) Which of the following substances is more likely dissolved in CC14?
a) CB14
b) HBr
c) HCI
d) CH3CH2OH](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F9796c4b2-2c3c-468d-bcae-01f129b0fd2d%2Fe5574a5d-1481-425e-9f59-5bf475884d72%2Fp2tw5x_processed.jpeg&w=3840&q=75)
Transcribed Image Text:1Angstrom= 100 pm, 1 atm = 760 torr, R 8.3145 J/K. mol, R=0.08206 L. atm/K. mol
Q1) Which of the following statements regarding collision and transition state theories
is INCORRECT?
a) Activation energy is always positive.
b) Reactants must collide to form products.
c) Reactant collisions must be oriented properly to form products.
d) All reactant collisions result in product formation.
Q2) Calculate the rate constant for the first order decomposition reaction of phosphine
(at 120 °C): 4PH3(g) → P4(g) + 6H2(g)?
[PH3], M
Time (sec)
a) 2.47x102 s-1
4.64 x 102
2.32 x 102
1.16 x 10-2
5.80 x 103
28
56
84
b) 28 s
c) 4.64 x 102 s
d) 3.57 x 102 s
Q3) Which of the following is true depending on the given rate law: Rate =
k[IO; ][I-]°[H*]?
a) This reaction is 1st order with respect to IO3- and 3rd order for the overall reaction.
b) This reaction is 2nd order with respect to I- and 3rd order for the overall reaction.
c) This reaction is 1 order with respect to IO3- and 5th order for the overall reaction.
d) This reaction is 3rd order with respect to H*.
Q4) The 1st order reaction: A → products, the [A], = 0.40 M. What is the concentration
of A after 12 seconds if the half-life of the reaction is 2 seconds?
a) 0.10 M
b)8.0 x 102 M
c)1.01 x 102 M
d) 6.22 x 103 M
Q5) The following reaction 2A + 3B -→ Products has rate constant k1 = 1.8 L/mol.sec
at 550 °C and rate constant k2 = 2.8 L/mol.sec at 25 °C. Calculate the activation energy
for this reaction?
a) 1.4 x 105 J/mol
b)2.0 x 105 J/mol
c) 3.6 x 105 J/mol
d)2.5 x 105 J/mol
Q6) Which of the following substances is more likely dissolved in CC14?
a) CB14
b) HBr
c) HCI
d) CH3CH2OH
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